The top after-market NYSE gainers Wednesday were Fusion-io, Global Geophysical Services, On Assignment, AVG Technologies and Bally Technologies. The top after-market NYSE losers were Skechers USA, Whiting USA Trust, Accuride Corp, Prologis Inc and Unisys Corp.

Gainers

Fusion-IO Inc. (NYSE:FIO) shares climbed 12.09 percent to $18.64 in post-market trading. The company reported third quarter adjusted net loss of $3.17 million or $0.03 per share, better than Reuters' estimate of a loss of $0.07 per share. Fusion-io currently expects fourth quarter revenues to be about $110 million and fiscal 2013 revenue to be about $435 million, above analysts’ estimate of $107.34 million for the fourth quarter and $426.43 million for the fiscal year.

Global Geophysical Services Inc. (NYSE:GGS) shares climbed 9.81 percent to $2.35 in post-market trading. The company reported first quarter adjusted net profit of $0.05 per share. Quarterly revenues surged to $83.4 million from $55.3 million last year and also topped analysts’ estimate of $63.14 million.

On Assignment Inc. (NYSE:ASGN) shares climbed 8.48 percent to $24.30 in post-market trading. Its first quarter net profit surged to $24.6 million or $0.46 per share from $5.4 million or $0.14 per share in the same period last year. Revenues climbed nearly 150 percent to $389.19 million compared to $156.76 million last year and topped Reuters' estimate of $378.47 million.

AVG Technologies N.V. (NYSE:AVG) shares surged 7.73 percent to $15.19 in post-market trading. Currently, the company expects fiscal 2013 adjusted net profit to be in a range of $1.74 and $1.94 per share on revenues of $414 million to $422 million, above analysts’ estimate of $1.80 earnings per share on revenues of $411.03 million

Bally Technologies Inc. (NYSE:BYI) shares surged 6.42 percent to $52.23 in post-market trading. The company announced that its Board of Directors authorized a new $300 million share repurchase program, replacing the existing $150 million program under which the company had purchased approximately $63 million of common stock.

Losers

Skechers USA Inc. (NYSE:SKX) shares plunged 5.89 percent to $21.40 in post-market trading. The company expects first quarter net profit to be $0.08 to $0.12 per share on revenues of $440 million to $450 million.

Whiting USA Trust (NYSE:WHX) shares plunged 4.70 percent to $9.12 in post-market trading. The stock has a 52-week low of $4.35, a 52-week high of $18.69 and $132.68 million in market capitalization.

Accuride Corp. (NYSE:ACW) shares plunged 3.59 percent to $4.58 in post-market trading. The stock has a 52-week low of $2.21, a 52-week high of $7.40 and $225.24 million in market capitalization.

Prologis Inc. (NYSE:PLD) shares declined 2.76 percent to $41.50 in post-market trading. The company announced on Wednesday that it intends to offer 31 million shares of its common stock in a registered public offering.

Unisys Corp. (NYSE:UIS) shares fell 2.31 percent to $16.09 in post-market trading. The stock has a 52-week low of $14.40, a 52-week high of $24.73 and $724.36 million in market capitalization.

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